<style>
    body{
        background-color: #f9f9f9;
    }
</style>
<form id="xh_form" class="xh-form"  method="post"  >
    <div class="xh-area-form">
        <table style="width: 100%;border-collapse:separate; border-spacing:10px;">
            <tr align="center">
                <td id="type_msg" style="width: 100%;font-size: large">变更类型</td>
            </tr>
            <tr id="typeTr" align="center" style="display: block;">
                <td style="width:100%;">
                    <select title="变更类型" id="deviceType" name="deviceType" class="form-control">
                        <option value="1">备用机</option>
                        <option value="2">公用机</option>
                        <option value="3">教师机</option>
                        <option value="0">自用机</option>
                    </select>
                </td>
            </tr>
            <tr id="schoolTr" align="center" style="display: none;">
                <td style="width:100%;">
                    <select title="学校" id="school" name="school" class="form-control"></select>
                </td>
            </tr>
            <tr id="userTr" align="center" style="display: none;">
                <td style="width:100%;">
                    <select title="老师" id="teacher" name="teacher" class="form-control"></select>
                </td>
            </tr>
            <tr id="step1" align="center" style="display: block;">
                <td colspan="2">
                    <a id="bt_next1" class="btn btn-primary btn-sm" style="margin-left:5px;width: 90px;">下一步</a>
                    <a id="bt_cancel1" class="btn btn-default btn-sm" style="margin-left:20px;width: 90px;">取消</a>
                </td>
            </tr>
            <tr id="step2" align="center" style="display: none;">
                <td colspan="2">
                    <a id="bt_next2" class="btn btn-primary btn-sm" style="margin-left:5px;width: 90px;">下一步</a>
                    <a id="bt_cancel2" class="btn btn-default btn-sm" style="margin-left:20px;width: 90px;">取消</a>
                </td>
            </tr>
            <tr id="step3" align="center" style="display: none;">
                <td colspan="2">
                    <a id="bt_next3" class="btn btn-primary btn-sm" style="margin-left:5px;width: 90px;">确定</a>
                    <a id="bt_cancel3" class="btn btn-default btn-sm" style="margin-left:20px;width: 90px;">取消</a>
                </td>
            </tr>
        </table>
    </div>
</form>